/Engine/Source/Editor/UnrealEd/Public/Commandlets/ChunkDependencyInfo.h
Will create a dependency tree starting with RootTreeNode. If HighestChunk is == 0 it will only add dependencies on 0 for chunks already in the dependencies list
const [FChunkDependencyTreeNode](API\Editor\UnrealEd\Commandlets\FChunkDependencyTreeNode) * BuildChunkDependencyGraph ( int32 HighestChunk )